Cap fastening means for fountain pens



March 19, 1946. K. GjLYTTON 2,396,866

CAP FASTENING MEANS FOR FOUNTAIN PENS Filed Dec. 9, 1944 G MEANS FOR FOUNTAIN PENS -Kenneth G. Lytton, Gastonia, N. (3., assignor to Margaret Carpenter Lytton,

Mount Holly,

Application December a, nus, Serial n 567,363

- provided on the interior of the cap for normally 3 Claims.

This invention relates to a fountain pen and more especially to a fountain pen having means for releasing and locking thecap which covers the pen point when the pen is not in use so that it cannot accidentally become unfastened while being carried in the pocket of the owner.

It is an object of this invention to provide a fountain pen having a cap provided with means adapted to engage a peripheral groove in the fountain pen barrel to releasably lock the cap on the fountain pen barrel so that it cannot become detached from the fountain pen barrel until a button is pressed to release the locking means, which are on the interior of the cap, from engagement with a shoulder on the barrel of the fountain pen so that the cap can be removed.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds when taken in connection with the accompanying drawing in which,

Figure 1 is an elevation of a fountain pen equipped with my invention:

Figure 2 is a longitudinal section view taken through the right hand portion of Figure 1 and sho the fountain pen barrel in elevation;

Figure 3 is a transverse sectional View taken along the line's-t in 1 Figure 4 is an isometric view of the fastening means removed from the interior of the cap.

Referring more specifically to the drawing, the numeral it indicates the barrel of a fountain pen having a conventional point H. The barrel of the pen is conventional in every respect except that it has peripheral enlargement at 52 which provides immediately behind this enlargement 2 a groove it.

The cap of the fountain pen is-indicated at It and on the interior thereof has imbedded in the inner surface a band it which has extending forwardly therefrom a plurality of, prongs It which have shoulders l'l thereon and out turned or sloping portions '8. The interior of the barrel, if desired, may be cut away slightly by longitudinal grooves l9. to allow outward ex.- pansion of these outwardly flaring portions it. The pen cap Id when slipped over the barrel of the fountain pen and fastened by friction or by holding the parts in the position shown in Figure 2, and which will give way when button 23 is pressed to the left of Figure 2 to allow the whole assembly of ring and portions 2! to move downwardly with respect to the sloping portions of members 18 to expand them all outwardly so that the cap can be removed from the fountain pen.

In the drawing and specification there has been set forth a. preferred embodiment of the invention, the scope of the invention being defined in the claims:

I claim:

1. In a fountain pen having a barrel portion and a cap member, the barrel portion having a peripheral groove therein forming a shoulder on one side thereof adjacent the pen point end of the barrel, the cap member having secured on so its interior surface a plurality of shoulder members which are resiliently pressed normally into the peripheral groove when the cap is inserted over the barrel portion of the fountain pen, slidable means mounted in the cap and adapted to engage the shouldered members to press them and a cap. portion, adapted to cover that end of v the barrel portion having the pen point therein, the barrel portion having a peripheral shoulder as thereon, the cap portion having on the interior thereof a plurality of inwardly projecting prongs having a shoulder near their free ends adapted to press in behind the shoulder on the barrel when the cap is inserted over the end of the j barrel portion, and means slidably mounted in the closed end of the cap and extending from the exterior of the cap and adapted to engage the inwardly projecting shoulder members for pressing the same outwardly to a, position where the shoulder members will become disengaged from screwing the same thereon, when it has reached a predetermined point, will cause the shoulders IT to drop down into the groove It and releasably lock the cap it in position.

For unlocking these prongs it from the groove It so they will pass over the shoulder I2, I have provided a circular band or ring 20; with a plurality of members 2| extending longitudinally of the pen and the merging into one portion as at 22, and this portion 22 is fixed securely in a the shoulder on the barrel portion so that the cap can be removedfrom the barrel portion of the fountain pen.

3. A fountain pen having a barrel portion and a cap portion, means on the interior of the cap portion for engaging the barrel portion and re-,

leasably locking the cap portion on the barrel portion, and means slidably mounted inside the cap portion and extending to the exterior of the 5 cap portion and adapted to be pushed inwardly button 23 mounted in the top or closed end of the cap II. A pair of leaf springs Il may be removed,

to move the locking means out of :ngagement with the barrel portion to permit the cap to be KENNE'I'H G. LYTTON. 

